package com.itheima.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.common.R;
import com.itheima.dao.Category;
import com.itheima.dao.Dish;
import com.itheima.dao.DishFlavor;
import com.itheima.dto.DishDto;
import com.itheima.service.CategoryService;
import com.itheima.service.DishFlavorService;
import com.itheima.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;


/**
 * 菜品管理
 * */
@Slf4j
@RestController
@RequestMapping("/dish")
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 新增菜品
     * */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        //Set keys = redisTemplate.keys("dish_*");
        //redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
        String key ="dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页
     * */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name){
        Page<Dish> pageInfo = new Page(page,pageSize);

        Page<DishDto> dishDtoPage = new Page<>();

        LambdaQueryWrapper<Dish> lambdaQueryWrapper = new LambdaQueryWrapper<Dish>();
        lambdaQueryWrapper.like(name != null,Dish::getName,name);
        lambdaQueryWrapper.orderByDesc(Dish::getUpdateTime);

        dishService.page(pageInfo,lambdaQueryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");

        List<Dish> records= pageInfo.getRecords();

        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类Id

            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }


    /**
     * 根据id查询菜品信息和对应的口味信息
     * */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){
        DishDto dishDto = dishService.getByIdWithFlavor(id);


        return R.success(dishDto);
    }

    /**
     * 修改菜品
     * */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.updateWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        //Set keys = redisTemplate.keys("dish_*");
        //redisTemplate.delete(keys);

        //清理某个分类下面的菜品缓存数据
        String key ="dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * 停售
     * */
    @PostMapping("/status/{st}")
    public R<String> status(@PathVariable int st ,String ids){
        String[] split = ids.split(",");
        List<Long> idList = Arrays.stream(split).map(s -> Long.parseLong(s.trim())).collect(Collectors.toList());
        List<Dish> dishes = idList.stream().map((item) -> {
            Dish dish = new Dish();
            dish.setId(item);
            dish.setStatus(st);
            return dish;
        }).collect(Collectors.toList());

        dishService.updateBatchById(dishes);
        return R.success("操作成功");
    }

    @DeleteMapping
    public R<String> delete(String ids){
        String[] split = ids.split(",");
        //每个还是字符串，转换为long
        List<Long> idList = Arrays.stream(split).map(s -> Long.parseLong(s.trim())).collect(Collectors.toList());
        dishService.removeByIds(idList);
        return R.success("删除成功");
    }

//
//    /**
//     * 根据条件查询菜品数据
//     * */
//    @GetMapping("/list")
//    public R<List<Dish>> list(Dish dish){
//        LambdaQueryWrapper<Dish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
//        lambdaQueryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
//        lambdaQueryWrapper.eq(Dish::getStatus,1);
//        lambdaQueryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
//        List<Dish> list = dishService.list(lambdaQueryWrapper);
//        return R.success(list);
//    }

    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtoList =null;
        // 动态构造key
        String key = "dish_"+dish.getCategoryId()+"_"+dish.getStatus();
        //先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

        if (dishDtoList != null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }

        LambdaQueryWrapper<Dish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
        lambdaQueryWrapper.eq(Dish::getStatus,1);
        lambdaQueryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(lambdaQueryWrapper);
        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类Id

            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            //当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
            queryWrapper.eq(DishFlavor::getDishId,dishId);
            List<DishFlavor> dishFlavorList = dishFlavorService.list(queryWrapper);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());


        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }

}
